GB532783A - Improved method of coating the interior surface of the envelopes of electric lamps - Google Patents

Improved method of coating the interior surface of the envelopes of electric lamps

Info

Publication number
GB532783A
GB532783A GB26231/39A GB2623139A GB532783A GB 532783 A GB532783 A GB 532783A GB 26231/39 A GB26231/39 A GB 26231/39A GB 2623139 A GB2623139 A GB 2623139A GB 532783 A GB532783 A GB 532783A
Authority
GB
United Kingdom
Prior art keywords
bulb
binder
sept
interior
suspension
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB26231/39A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Westinghouse Electric International Co
Original Assignee
Westinghouse Electric International Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Westinghouse Electric International Co filed Critical Westinghouse Electric International Co
Publication of GB532783A publication Critical patent/GB532783A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)

Abstract

532,783. Coating articles ; luminescent materials. WESTINGHOUSE ELECTRIC INTERNATIONAL CO. Sept. 20, 1939, No. 26231. Convention date, Sept. 29, 1938. [Class 39 (i)] [Also in Group III] A layer of light diffusing or luminescent material is applied to the interior of an electric lamp bulb by forming a suspension of the material in a high viscosity binder, which is poured into the bulb &c. and caused to flow over the whole of the interior ; the bulb is then placed so that excess material may flow out during which time a controlled circulation of air is passed through the bulb. A pipe with perforated end is inserted in the bulb and connected either to a vacuum pump or to a source of air under pressure. The binder may be cellulose acetate or nitro-cellulose dissolved in amyl acetate. After the excess material has been removed the bulb is heated either at a high temperature or in two stages the first at 270‹ C. and the second at 450‹ C. The binder with material in suspension may be sprayed into the bulb ; zinc silicate may be the luminescent material.
GB26231/39A 1938-09-29 1939-09-20 Improved method of coating the interior surface of the envelopes of electric lamps Expired GB532783A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US532783XA 1938-09-29 1938-09-29

Publications (1)

Publication Number Publication Date
GB532783A true GB532783A (en) 1941-01-30

Family

ID=21983094

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26231/39A Expired GB532783A (en) 1938-09-29 1939-09-20 Improved method of coating the interior surface of the envelopes of electric lamps

Country Status (1)

Country Link
GB (1) GB532783A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1118880B (en) * 1952-03-28 1961-12-07 Egyesuelt Izzolampa Colored electric incandescent lamp and method of making it
DE977222C (en) * 1951-04-26 1965-06-24 Egyesuelt Izzolampa Process for the production of a coating on the inside of a bulb of an electric incandescent lamp that causes light scattering and a getter effect

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE977222C (en) * 1951-04-26 1965-06-24 Egyesuelt Izzolampa Process for the production of a coating on the inside of a bulb of an electric incandescent lamp that causes light scattering and a getter effect
DE1118880B (en) * 1952-03-28 1961-12-07 Egyesuelt Izzolampa Colored electric incandescent lamp and method of making it

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